They were a West Slavic ethnicity and a linguistic group, indigenous to the regions of Wendland (German: Hannoversches Wendland) and Drawehn, located to the west of the Elbe River, in the Duchy of Brunswick-Lüneburg (now the county of Lüchow-Dannenberg in Lower Saxony). They spoke a now extinct language known as Drevani Polabian (German: Dravänopolabisch), a variety of Western Polabian,
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Don't get me wrong, I understand the curiosity here. The ancestry tests are a tool to

discover a plethora of people all carrying snippets of the same DNA as you then pestering them over social media with "Haaii! we're soooo related cuz we share 3.5% of our DNA. Isn't it great? We're practically sisters :)"

Statistically, you and some random nigga on the street are more related than any of them historic niggas from the 2nd BCE, 9th CE, 12th, 15th, 16th century y'all think are related to.

You, me, your pet, everyone is a jumble of DNA; autistic gene LEGO blocks randomly smashed together as if by a neurotypical baby in a fit then thrown in a jambalaya pot and overcooked by burned-out
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